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. 2017 Oct 25;284(1865):20171097. doi: 10.1098/rspb.2017.1097

Figure 2.

Figure 2.

Effect of the level of iridescence detectability on the duration (a–c), number of visits (d) and proportion of correct choices (e,f) during learning (a,d), generalization (b,e) and memory retention test (c,f).